US4292364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer board
Assignee: Heidelberg Materials AG
•
Filing: 1979-11-19
•
Granted: 1981-09-29
•
Expires: 1999-11-19
Abstract
Abstract A multi-layer load-bearing board comprising at least three layers of different composition includes a core or basic layer comprised of a cementitious inorganic material, a cover layer of a fiber-reinforced resin subjectable to forces and an intermediate layer of a hydrophilic and water-dilutable or water miscible resin interconnecting the core or basic layer and cover layers in a force-transmitting manner.
Inventors
- 👤 Ludwig Wesch
- 👤 Adolf Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
B; B32; B32B; B32B13/00; B32B13/04; B32B13/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249932; Y10T428/24994; Y10T428/24995; Y10T428/249952; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992; Y10T442/60; Y10T442/699
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
62 words
A multi-layer load-bearing board comprising at least three layers of different composition, including (a) basic layer comprised of a cementitious inorganic material, (b) a cover layer subjectable to mechanical forces and consisting of a fiber-reinforced organic plastic and (c) an intermediate layer of a hydrophilic resin dilutable or miscible with water interconnecting the basic layer and cover layer in a force-transmitting manner.
Claim 2
Dependent Claim
62 words
A multi-layer load-bearing board comprising at least three layers of different composition, including (a) basic layer comprised of a cementitious inorganic material, (b) a cover layer subjectable to mechanical forces and consisting of a fiber-reinforced organic plastic and (c) an intermediate layer of a hydrophilic resin dilutable or miscible with water interconnecting the basic layer and cover layer in a force-transmitting manner.
Claim 3
Dependent Claim
37 words
The multi-layer load-bearing board of claim 1, wherein the cementitious inorganic material of the basic layer comprises a binder selected from the group consisting of cement, lime, gypsum, magnesite and a mixture of magnesia and magnesium chloride.
Claim 4
Dependent Claim
18 words
The multi-layer load-bearing board of claim 2, wherein the cementitious inorganic material of the basic layer contains aggregates.
Claim 5
Dependent Claim
17 words
The multi-layer load-bearing board of claim 1, wherein the basic layer is comprised of mortar or concrete.
Claim 6
Dependent Claim
14 words
The multi-layer load-bearing board of claim 1, wherein the cementitious inorganic material contains admixtures.
Claim 7
Dependent Claim
16 words
The multi-layer load-bearing board of claim 1 or 5, wherein the cementitious inorganic material is fiber-reinforced.
Claim 8
Dependent Claim
21 words
The multi-layer load-bearing board of claim 6, wherein the reinforcing fiber is selected from filaments, staple fibers, fibrous mats and rovings.
Claim 9
Dependent Claim
13 words
The multi-layer load-bearing board of claim 1, wherein the intermediate layer is fiber-reinforced.
Claim 10
Dependent Claim
21 words
The multi-layer load-bearing board of claim 8, wherein the reinforcing fiber is selected from filaments, staple fibers, fibrous mats and rovings.
Claim 11
Dependent Claim
15 words
The multi-layer load-bearing board of claim 1 or 8, wherein the intermediate layer contains fillers.
Claim 12
Dependent Claim
18 words
The multi-layer load-bearing board of claim 1 or 8, wherein the intermediate layer contains minor amounts of water.
Claim 13
Dependent Claim
19 words
The multi-layer load-bearing board of claim 21, wherein the synthetic resin of the cover layer is a thermosetting resin.
Claim 14
Dependent Claim
19 words
The multi-layer load-bearing board of claim 21, wherein the synthetic resin of the cover layer is a thermoplastic resin.
Claim 15
Dependent Claim
15 words
The multi-layer load-bearing board of claim 12 or 13, wherein the cover layer contains fillers.
Claim 16
Dependent Claim
25 words
The multi-layer load-bearing board of claim 1, wherein the reinforcing fiber of the cover layer is selected from filaments, staple fibers, fibrous mats and rovings.
Claim 17
Dependent Claim
42 words
The multi-layer load-bearing board of claim 1, comprising two of said cover layers and two of said intermediate layers interconnecting the basic and respective ones of the cover layers in a force-transmitting manner, the basic layer being interposed between the intermediate layers.
Claim 18
Dependent Claim
21 words
The multi-layer load-bearing board of claim 1 or 16, further comprising a coating over at least one of the cover layers.
Claim 19
Dependent Claim
15 words
The multi-layer board of claim 17, wherein a reinforcing material is embedded in the coating.
Claim 20
Dependent Claim
18 words
The multi-layer load-bearing board of claim 2, wherein the cementitious inorganic material of the basic layer contains fillers.
Claim 21
Dependent Claim
18 words
The multi-layer load-bearing board of claim 1 or 8, wherein the intermediate layer contains minor amounts of cement.
Claim 22
Dependent Claim
19 words
The multi-layer load-bearing board of claim 1, wherein the fiber-reinforced plastic of the cover layer comprises a synthetic resin.
References Cited (Backward Citations)
US2451446A
Cited
GB1080754A
Cited
GB1269338A
Cited
US3809595A
Cited
US3775240A
Cited
CA937149A
Cited
US3922413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |